switching to use real dates.

src/cljs/auto_ap/views/utils.cljs

@@ -25,10 +25,12 @@
 (def pretty (format/formatter "MM/dd/yyyy"))
 
 (defn date->str [d]
-  (format/unparse pretty d))
+  (when d
+    (format/unparse pretty d)))
 
 (defn date-time->str [d]
-  (format/unparse pretty-long d))
+  (when d
+    (format/unparse pretty-long d)))